package com.example.variety_weather;

import android.app.ProgressDialog;
import android.content.Intent;
import android.media.tv.TvContract;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;

import com.example.variety_weather.db.City;
import com.example.variety_weather.db.County;
import com.example.variety_weather.db.Province;
import com.example.variety_weather.util.HttpUtil;
import com.example.variety_weather.util.Utility;

import org.litepal.crud.DataSupport;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.Response;


/*
*
* https://gitee.com/biuo/DiDiWeather----Android-App/blob/master/app/src/main/java/com/coolweather/android/ChooseAreaFragment.java
* */
/*
* 遍历省市县数据的碎片类
* */

public class ChooseAreaFragment extends Fragment {
    public static final int LEVEL_PROVINCE=0;
    public static final int LEVEL_CITY=1;
    public static final int LEVEL_COUNTY=2;
    private ProgressDialog progressDialog;
    private TextView titleText;
    private Button backButton;
    private ListView listView;
    private ArrayAdapter<String> adapter;
    private List<String> dataList = new ArrayList<>();

    /*
    * 省列表
    * */
    private List<Province> provinceList;

    /*
    * 市列表
    * */
    private List<City> cityList;

    /*
    * 县区表
    * */
    private List<County> countyList;

    /*
     * 选中的省份
     **/
    private Province selectedProvince;

    /*
    * 选中的城市
    * */
    private City selectedCity;

    /*
    * 当前选中的级别
    * */
    private int currentLevel;

    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container,
                             @Nullable Bundle savedInstanceState) {
        View view=inflater.inflate(R.layout.choose_area,container,false);
        titleText=(TextView)view.findViewById(R.id.title_text);
        backButton=(Button)view.findViewById(R.id.back_button);
        listView=(ListView)view.findViewById(R.id.list_view);
        adapter=new ArrayAdapter<>(getContext(),android.R.layout.simple_list_item_1,dataList);//初始化ArrayAdapter
        listView.setAdapter(adapter);//将Array Adapter设置为listView的适配器
        return view;
    }

    @Override
    public void onActivityCreated(@Nullable Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {//给listView设置点击事件
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                if(currentLevel==LEVEL_PROVINCE){
                    selectedProvince=provinceList.get(position);
                    queryCities();
                }else if(currentLevel==LEVEL_CITY){
                    selectedCity=cityList.get(position);
                    queryCounties();
                }

            }
        });
        queryProvinces();

    }
    /*
    * 查询全国所有省，优先从数据库查询，如果没有，从服务器上查询
    * */

    private void queryProvinces() {
        titleText.setText("中国");
        backButton.setVisibility(View.GONE);
        provinceList=DataSupport.findAll(Province.class);
        if(provinceList.size()>0){
            dataList.clear();
            for(Province province:provinceList){
                dataList.add(province.getProvinceName());
            }
            adapter.notifyDataSetChanged();
            listView.setSelection(0);
            currentLevel=LEVEL_PROVINCE;
        }else{
            String address="http://guolin.tech/api/china";
            queryFromServer(address,"provive");
        }
    }
    /*
     * 查询全国所有的省，优先从数据库查询，如果没有再去服务器上查询
     * */
    private void queryCities() {
        titleText.setText(selectedProvince.getProvinceName());
        backButton.setVisibility(View.VISIBLE);
        cityList= DataSupport.where("provinceeid=?",
                String.valueOf(selectedProvince.getId())).find(City.class);
        if(cityList.size()>0){
            dataList.clear();
            for(City city:cityList){
                dataList.add(city.getCityName());
            }
            adapter.notifyDataSetChanged();
            listView.setSelection(0);
            currentLevel=LEVEL_CITY;
        }else{
            int proinceCode=selectedProvince.getProvinceCode();
            String address="http://guolin.tech/api/china/"+proinceCode;
            queryFromServer(address,"city");
        }

    }

    /*
    * 查询选中市内所有的县，优先从数据库查询，如果没有查询到，就再去服务器里查询
    * */
    private void queryCounties() {
    titleText.setText(selectedCity.getCityName());
    backButton.setVisibility(View.VISIBLE);
    countyList=DataSupport.where("city=?",
            String.valueOf(selectedCity.getId())).find(County.class);
    if(countyList.size()>0){
        dataList.clear();
        for (County county:countyList){
            dataList.add(county.getCountyName());
        }
        adapter.notifyDataSetChanged();
        listView.setSelection(0);
        currentLevel=LEVEL_COUNTY;
    }else{
        int provinceCode=selectedProvince.getProvinceCode();
        int cityCode=selectedCity.getCityCode();
        String address="http://guolin.tech/api/china/"+provinceCode+"/"+cityCode;
        queryFromServer(address,"county");
       }
    }
            /*
             * 根据传入的地址和类型服务器上查询省市县数据
             * */

            private void queryFromServer(String address, final String city) {
                showProgressDialog();
                HttpUtil.sendOkHttpRequest(address, new Callback() {
                    @Override
                    public void onResponse(Call call, Response response) throws IOException {
                        String responseText=response.body().string();
                        boolean result=false;
                        if("provice".equals(city)){
                            result= Utility.handleProvinceResponse(responseText);
                        }else if("city".equals(city)){
                            result=Utility.handleCityResponse(responseText,selectedCity.getId());
                        }
                        if (result){
                            getActivity().runOnUiThread(new Runnable() {
                                @Override
                                public void run() {
                                    closeProgreessDialog();
                                    if("province".equals(city)){
                                        queryCounties();
                                    }
                                }
                            });
                        }
                    }
                    @Override
                    public void onFailure(Call call, IOException e) {
                        //通过runOnuiThread()方法回到主线程处理逻辑
                        getActivity().runOnUiThread(new Runnable() {
                            @Override
                            public void run() {
                                closeProgreessDialog();
                                Toast.makeText(getContext(),"加载失败",Toast.LENGTH_SHORT).show();
                            }
                        });
                    }

                });
            }
        /*
         * 显示进度对话框
         * */
        private void showProgressDialog() {
            if(progressDialog==null){
                progressDialog=new ProgressDialog(getActivity());
                progressDialog.setMessage("正在努力加载...");
                progressDialog.setCanceledOnTouchOutside(false);
            }
            progressDialog.show();
        }
        /*
        * 关闭进度对话框
        * */
        private void closeProgreessDialog(){
            if(progressDialog!=null){
                progressDialog.dismiss();
            }
    }
}
